Problem on server after upgrad from .NET 4.6 to .NET 4.8 (site is KO)

Question

Hello, We have just updated the version of an asp.net MVC project from .NET framework 4.6 to .Net 4.8. Following this, the solution compiles and works well locally whereas this is not the case after deploying the site. it no longer works on the server knowing that the .NET 4.8 version is installed on our server machine and the dependencies are up to date. Can you give me a lead and an idea, it's possible that I'm missing something? Thank you.

Answer 1

System.Net.Http was reworked for net 4.6.1 and is part of the framework so you no longer include the package. you probably have a 4.6 project or nuget package that is dependent on the old package. You can fix up the projects or just a add a binding override in web.config

if it runs locally, than check the hint paths in the project files, they are probably out of date.

Answer 2

This is the generic error page so it doesn't provide any useful information. Enable custom errors in your app's web.config and then try again. You'll get a more detailed error message.

<system.web>
        <customErrors mode="On" />
</system.web>

Note that if you upgrade the .NET Framework then you must ensure all the web components are restarted. If you rebooted the server then that is sufficient. If you didn't, and a reboot wasn't required, then you have to restart multiple services.

Stop-Service w3svc
Stop-Service was

Start-Service w3svc

If that doesn't help then reregister ASPNET using aspnet_regiis -i.

Answer 3